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| Research on Twist-Bend Forming and Performance Control of Titanium Alloy Wide-Chord Hollow Fan Blade Under High Temperature |
| CHEN Minghe 1 , FENG Rui 1 , WANG Ning 2 , SHI Wenxiang 1 , XIE Lansheng 1 , MA Guanglu 3 , XU Yanqiang 3 , MEI Han 3 |
1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. Nanjing Vocational University of Industry Technology, Nanjing 210023, China;
3. AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China |
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Abstract The thermal deformation behavior of TC4 titanium alloy was studied by using UTM 5504X electronic universal testing machine at 650 – 850 ℃ and strain rate 10–3 – 1 s–1 . The modified Misiolek hardening model was established and the flow stress of the material under different deformation conditions can be predicted accurately by this model. At the same time, the finite element model of high temperature twist-bend forming of TC4 titanium alloy hollow blade was established. Considering the simulation results, the optimal process parameters of twist-bend forming of TC4 titanium alloy hollow blade were determined as follows: twist forming temperature 750 ℃, twist forming section 550 mm and twist angular velocity 1.938°/min. The result is found that the content of α phase decreases and the content of β phase continues to increase under the condition of high temperature deformation, and the material has high elongation and plastic forming property. Finally, the hollow blade prepared by bending and torsional forming has a smooth overall transition, no surface defects and has good forming quality. The research results can provide guidance for the mass manufacturing of TC4 titanium alloy wide-string hollow fan blade.
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2022, 
